Lid for an air-tight container

ABSTRACT

A lid for an air-tight container is composed of a base and a seal. The base has a circular groove defined in a bottom face thereof. The seal has a circular extension formed to correspond to the circular groove. When the circular extension is received in the circular groove, the engagement between the base and the seal is secured.

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a lid, and more particularly toa lid for an airtight container. The lid is composed of a base and aseal having a circular extension extending out from the seal andreceived in a circular groove in the base, such that the seal is able tosecurely engage with the base.

[0003] 2. Description of Related Art

[0004] When an object is to be stored, people usually would think ofusing an air-tight container, especially when the object needs to beisolated from moisture. The principle of the air-tight container isbased on the seal on the lid. The seal is made of rubber and is securelymounted on a bottom face of the lid by the elasticity of the seal. For ashort period of time, the air-tight container works well in preservingthe object. However, after continuously using the container, theelasticity of the seal can be lost through either work hardening orstretching of the seal material. Thus, the engagement between the sealand the lid is not able to secure the seal to the lid anymore. The usermay find that the seal keeps on falling from the lid, which causes a lotof trouble for the user.

[0005] To overcome the shortcomings, the present invention tends toprovide an improved lid for an air-tight container to mitigate andobviate the aforementioned problems.

SUMMARY OF THE INVENTION

[0006] The primary objective of the present invention is to provide alid having a seal which is able to securely engaged with a bottom faceof the lid so that even after a long period of time using the lid, theseal will not fall off from the lid of the air-tight container.

[0007] In order to accomplish the foregoing objective, the lid iscomposed of a base and a seal having a circular extension extending outfrom the seal and received in a circular groove in the base, such thatthe seal is able to securely engage with the base.

[0008] Other objects, advantages and novel features of the inventionwill become more apparent from the following detailed description whentaken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0009]FIG. 1 is an exploded perspective view of the air-tight containerof the present invention;

[0010]FIG. 2 is a side view showing the structures of the seal and thebase; and

[0011]FIG. 3 is a side view showing the engagement between the seal andthe base.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0012] With reference to FIG. 1, an air-tight container is composed of ahollow cylinder (1) with an open end and a closed end, and a lid (2)pivotally engaged with the hollow cylinder (1) so that the lid (2) isable to cover the open end of the hollow cylinder (1).

[0013] The lid (2) is composed of a base (21) and a seal (22) which ismade of rubber.

[0014] With reference to FIG. 2, the base (21) has a circular groove(211) defined in a bottom face of the base (21). The seal (22) has acircular extension (221) extending from a face of the seal (22) tocorrespond to the circular groove (211).

[0015] With reference to FIG. 3, when the seal (22) is in assembly withthe base (21), the circular extension (221) is inserted into thecircular groove (211). The dimension of the circular groove (211) is soconfigured that when the circular extension (221) of the seal (22) isinserted into the circular groove (211), a step (222) formed adjacent tothe circular extension (221) is able to engage with a bottom face of thebase (21), which accomplishes the air-tight objective. Furthermore, thecircular extension (221) being received in the circular groove (211)ensures the secure engagement between the seal (22) and the base (21).It is noted that in order to ensure that the seal (22) will securelyengage with the base (21), an inner diameter of the circular extension(221) is slightly smaller than an inner of the circular groove (211)such that when the circular extension (221) is inserted into thecircular groove (211), the elasticity of the seal (22) will ensure thatthe seal (22) stays in place with respect to the base (21).

[0016] It is to be understood, however, that even though numerouscharacteristics and advantages of the present invention have been setforth in the foregoing description, together with details of thestructure and function of the invention, the disclosure is illustrativeonly, and changes may be made in detail, especially in matters of shape,size, and arrangement of parts within the principles of the invention tothe full extent indicated by the broad general meaning of the terms inwhich the appended claims are expressed.

What is claimed is:
 1. A lid for an air-tight container, the lidcomprising: a base having a circular groove defined in a bottom face ofthe base; and a rubber seal with a circular extension extending from aface of the rubber seal to correspond to the circular groove so thatafter the circular extension of the rubber seal is received in thecorresponding circular groove of the base, an engagement between thebase and the rubber seal is secured, wherein an inner diameter of thecircular extension is slightly smaller than an inner of the circulargroove such that when the circular extension is inserted into thecircular groove, the elasticity of the seal will ensure that the sealstays in place with respect to the base.
 2. The lid as claimed in claim1 further comprising a step formed adjacent to the circular extension tocorrespond to the bottom face of the base such that an engagementbetween the step and the bottom face of the base secures air-tightengagement of the container.